\begin{tikzpicture}
    \pgfmathsetmacro{\factor}{.025}

    \tkzDefPoints{0/0/O}
    \foreach \n [count=\i] in {110, 90, 70} {
        \ifnum\i=2\relax
            \def\linestyle{densely dash dot}
        \else
            \def\linestyle{very thick}
        \fi

        \pgfmathsetmacro{\R}{\n*\factor}

        \tkzDefPoint(40:\R){A\i}
        \tkzDefPoint(140:\R){B\i}
        \tkzDrawArc[\linestyle](O,A\i)(B\i)

        \tkzDefLine[perpendicular=through A\i, normed](A\i,O)  \tkzGetPoint{c\i}
        \tkzDefPointOnLine[pos=70*\factor](A\i,c\i)  \tkzGetPoint{C\i}
        \tkzDrawSegment[\linestyle](A\i,C\i)

        \tkzDefLine[perpendicular=through B\i, normed](O,B\i)  \tkzGetPoint{d\i}
        \tkzDefPointOnLine[pos=70*\factor](B\i,d\i)  \tkzGetPoint{D\i}
        \tkzDrawSegment[\linestyle](B\i,D\i)
    }
    \tkzDrawSegments[very thick](C3,C1  D3,D1)

    %
    \tkzLabelPoints[below](O)
    \extkzLabelAngel[0.5](A2,O,B2){$100^\circ$}
    \tkzDrawSegment[-Latex](O,A2)
    \tkzLabelSegment[pos=.4, rotate=45](O,A2){$R\;90$}

    \tkzDefPoint(90:90*\factor){l}
    \tkzLabelPoints[centered, fill=white, inner sep=1pt](l)

    \tkzDrawLines[add=0 and 0.2](O,A1   O,B1)
    \tkzDrawLines[add=0 and 0.5](C3,C1  D3,D1)

    \tkzDrawSegments[sloped, dim={$70$,1em,}](A1,C1)
    \tkzDrawSegments[sloped, dim={$70$,1em,}](D1,B1)
\end{tikzpicture}

